Yes, the red moore root aka spiderwood is expensive! The piece on the left of the pic is a huge stump turned upside down- cost 85.00 Us dollars. The "clump" on the right is made up of about six pieces, cost was 10, to 20 per piece. Substrate is new for me- before this, I had pea gravel. After much searching around, I decided to try blasting sand. It is a brand called "black diamond"-I must say, after two weeks, no problems, and it looks great!! 8.00 for a 50# bag- but you have to wash the @!t out of it.